front sensors "locking up"
Thread Starter
Member
Joined: Mar 2017
Posts: 154
Likes: 11
From: St Louis
Merc CLS550
front sensors "locking up"
When starting up--if the front of the car is anywhere close to an object it goes into full RED warning mode and stays there (even after pulling away). It then will default to OFF (chrome dash button shows a RED LED--and all sensors OFF). If the chrome button is pressed--it reverts to full warning mode--(which is only silenced by again pushing the console chrome button).
Only way to over ride it is to shut down the car and re start.
As a work around--I have pushed the console button off when I start (before putting it into reverse--which activates the sensors) then once I've pulled away--I activate the sensors by pushing to turn them on.
It is really getting annoying and actually caused me to tap into a guy behind me (because I didn't pay close enough attention--forgot the sensors were not active).
It is not 100% Sometimes it all works as it should--but it has become maybe a 70% of the time occurence--so I need to get it fixed
Anyone else experience this?
What is the fix? What will it cost to fix it?
thanks !
Only way to over ride it is to shut down the car and re start.
As a work around--I have pushed the console button off when I start (before putting it into reverse--which activates the sensors) then once I've pulled away--I activate the sensors by pushing to turn them on.
It is really getting annoying and actually caused me to tap into a guy behind me (because I didn't pay close enough attention--forgot the sensors were not active).
It is not 100% Sometimes it all works as it should--but it has become maybe a 70% of the time occurence--so I need to get it fixed
Anyone else experience this?
What is the fix? What will it cost to fix it?
thanks !
Newbie
Joined: Aug 2017
Posts: 3
Likes: 0
From: Charleston, South Carolina
2014 CLS550 4MATIC
Hi Citizensane,
Just echoing exactly what you described. I thought it might be water on the bumper when I start, but that was a non-issue. I have to park close to another vehicle and more often than not the proximity system is disabled for my entire trip. I am not going to shut the car off just to see if they re-calibrate properly, I'll just drive annoyed...
Just echoing exactly what you described. I thought it might be water on the bumper when I start, but that was a non-issue. I have to park close to another vehicle and more often than not the proximity system is disabled for my entire trip. I am not going to shut the car off just to see if they re-calibrate properly, I'll just drive annoyed...
Thread Starter
Member
Joined: Mar 2017
Posts: 154
Likes: 11
From: St Louis
Merc CLS550
Hi Citizensane,
Just echoing exactly what you described. I thought it might be water on the bumper when I start, but that was a non-issue. I have to park close to another vehicle and more often than not the proximity system is disabled for my entire trip. I am not going to shut the car off just to see if they re-calibrate properly, I'll just drive annoyed...
Just echoing exactly what you described. I thought it might be water on the bumper when I start, but that was a non-issue. I have to park close to another vehicle and more often than not the proximity system is disabled for my entire trip. I am not going to shut the car off just to see if they re-calibrate properly, I'll just drive annoyed...
What a joke
Senior Member
Joined: Nov 2012
Posts: 357
Likes: 97
E63 S AMG, CLS550 4matic, C63 Ed 507, Volvo XC90 T8s
Thanks for the color. I have the same thing sometimes too so I might mention the battery thing when I do another service visit. I thought my park assist system was going bad.
Thread Starter
Member
Joined: Mar 2017
Posts: 154
Likes: 11
From: St Louis
Merc CLS550
Sounds like an expensive repair---they replaced various sensors?---my car is out of warranty. I will take it my indy guy for his input--but thanks for the battery tip--maybe that can short cut this
Thread Starter
Member
Joined: Mar 2017
Posts: 154
Likes: 11
From: St Louis
Merc CLS550
For the past two days--under the same previous circumstances--my problem has gone away--the parking sensors work as they are designed and should operate. Problem apparently solved !!
So--went from a bad event (new battery at 43K miles?)--to a fix for my sensor problems (which I dreaded to have the dealer solve $$$.xx or more?).
When I mentioned the sensor problem to my indy guy --he commented that the new battery might fix things--as the dead battery probably hadn't been generating enough voltage and the control panel/s were getting
"confused" and not booting up properly--thus triggering some kind of fault. He said that these newer cars are so loaded with electronics that the battery needed to be in good condition for the car to operate properly.
FYI
P S--It was the Main battery that failed and replaced (the one under the hood on the passenger side near the windshield)--NOT the accessory battery in the trunk in the spare compartment under the trunk floor.
Last edited by citizensane; Mar 3, 2018 at 09:50 AM.
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Senior Member
Joined: Feb 2009
Posts: 292
Likes: 46
From: Vancouver, Canada
2016 CLS550 4Matic
Believe I found the remedy for my erratic parking sensor operation (see my first post). A couple of days ago--I went to start my car and is was completely dead--zero cranking (not even clicking sound). Got the car jumped and went to my Indy guy who had a replacement battery on the shelf
For the past two days--under the same previous circumstances--my problem has gone away--the parking sensors work as they are designed and should operate. Problem apparently solved !!
So--went from a bad event (new battery at 43K miles?)--to a fix for my sensor problems (which I dreaded to have the dealer solve $$$.xx or more?).
When I mentioned the sensor problem to my indy guy --he commented that the new battery might fix things--as the dead battery probably hadn't been generating enough voltage and the control panel/s were getting
"confused" and not booting up properly--thus triggering some kind of fault. He said that these newer cars are so loaded with electronics that the battery needed to be in good condition for the car to operate properly.
FYI
P S--It was the Main battery that failed and replaced (the one under the hood on the passenger side near the windshield)--NOT the accessory battery in the trunk in the spare compartment under the trunk floor.
For the past two days--under the same previous circumstances--my problem has gone away--the parking sensors work as they are designed and should operate. Problem apparently solved !!
So--went from a bad event (new battery at 43K miles?)--to a fix for my sensor problems (which I dreaded to have the dealer solve $$$.xx or more?).
When I mentioned the sensor problem to my indy guy --he commented that the new battery might fix things--as the dead battery probably hadn't been generating enough voltage and the control panel/s were getting
"confused" and not booting up properly--thus triggering some kind of fault. He said that these newer cars are so loaded with electronics that the battery needed to be in good condition for the car to operate properly.
FYI
P S--It was the Main battery that failed and replaced (the one under the hood on the passenger side near the windshield)--NOT the accessory battery in the trunk in the spare compartment under the trunk floor.
BTW, my 2016 CLS550 does not have a battery in the spare tire well. Was that only on earlier models?
Best I can tell, my battery is in the engine compartment on the passenger side covered by some black plastic box (for the cabin air intake maybe?). It’s hard to be sure though as you actually can’t see it.
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Senior Member
Joined: Feb 2009
Posts: 292
Likes: 46
From: Vancouver, Canada
2016 CLS550 4Matic
